Enhanced non-codebook-based uplink transmissions in wireless cellular network
Systems, apparatuses, methods, and computer-readable media are provided to transmit multiple channel state information (CSI)-reference signal (RS) resources in different slots for non-Codebook based physical uplink shared channel (PUSCH) transmission in multi-transmission-reception point (TRP) operation. Other embodiments may be described and claimed.
1 . One or more non-transitory computer-readable media (NTCRM) having instructions, stored thereon, that when executed by one of more processors of a user equipment (UE) cause the UE to:
receive repetitions of a downlink control information (DCI) from multiple transmission-reception points (TRPs), wherein the DCI is to trigger a channel state information (CSI)-reference signal (RS) on a CSI-RS resource associated with a sounding reference signal (SRS) resource set;
identify that a scheduling offset between the DCI and the CSI-RS resource is less than a threshold; and
determine, based on the identifying, a default beam for transmission of the CSI-RS, wherein the default beam corresponds to a transmission configuration indicator (TCI) state associated with the repetitions of the DCI, wherein the SRS resource set is a first SRS resource set, wherein the NTCRM is to store configuration information for multiple SRS resource sets, including the first SRS resource set, with a usage of non-codebook, and wherein the instructions cause the UE to use different predefined slot offsets for CSI-RSs associated with the respective SRS resource sets.
2 . The one or more NTCRM of claim 1 , wherein the repetitions of the DCI are received in different control resource sets (CORESETs), and wherein the default beam corresponds to a transmission control index (TCI) state of a first CORESET of the CORESETs.
3 . The one or more NTCRM of claim 2 , wherein the first CORESET has a lowest ID among the CORESETs.
4 . The one or more NTCRM of claim 1 , wherein the SRS resource set is configured as non-codebook.
5 . The one or more NTCRM of claim 4 , wherein the SRS resource set is the only SRS resource set configured for non-codebook.
6 . The one or more NTCRM of any one of claim 1 , wherein the threshold is based on a capability of the UE.
7 . One or more non-transitory computer-readable media (NTCRM) having instructions, stored thereon, that when executed by one of more processors of a next generation Node B (gNB) cause the gNB to:
encode, for transmission to a user equipment (UE), one or more repetitions of a downlink control information (DCI) that is transmitted from multiple transmission-reception points (TRPs), wherein the DCI is to trigger a channel state information (CSI)-reference signal (RS) on a CSI-RS resource associated with a sounding reference signal (SRS) resource set;
identify that a scheduling offset between the DCI and the CSI-RS resource is less than a threshold;
determine, based on the identifying, a default beam for transmission of the CSI-RS, wherein the default beam corresponds to a transmission configuration indicator (TCI) state associated with the repetitions of the DCI, wherein the SRS resource set is a first SRS resource set, wherein the gNB is to configure the UE with multiple SRS resource sets, including the first SRS resource set, with a usage of non-codebook, and wherein the gNB is to use different predefined slot offsets for CSI-RSs associated with the respective SRS resource sets; and
receive the CSI-RS from the UE based on the default beam.
8 . The one or more NTCRM of claim 7 , wherein the repetitions of the DCI are transmitted in different control resource sets (CORESETs), and wherein the default beam corresponds to a transmission control index (TCI) state of a first CORESET of the CORESETs.
9 . The one or more NTCRM of claim 8 , wherein the first CORESET has a lowest ID among the CORESETs.
10 . The one or more NTCRM of claim 7 , wherein the instructions, when executed, are further to cause the gNB to configure the SRS resource set for the UE with a usage of non-codebook.
11 . The one or more NTCRM of claim 10 , wherein the SRS resource set is the only SRS resource set configured for non-codebook.
12 . The one or more NTCRM of any one of claim 7 , wherein the threshold is based on a capability of the UE.
13 . An apparatus to be implemented in a user equipment (UE), the apparatus comprising:
a memory to store configuration information for a sounding reference signal (SRS) resource set with a usage of non-codebook;
processor circuitry, coupled to the memory, to:
decode, in a first slot K, a downlink control information (DCI) to trigger an aperiodic CSI-RS based on the SRS resource set; and
determine a second slot K+L for transmission of the CSI-RS, wherein L is a predefined slot offset of available slots subsequent to the first slot K, wherein the SRS resource set is a first SRS resource set, wherein the memory is to store configuration information for multiple SRS resource sets, including the first SRS resource set, with the usage non-codebook, and wherein the processor circuitry is to use different predefined slot offsets for CSI-RSs associated with the respective SRS resource sets.
14 . The apparatus of claim 13 , wherein the slot offset corresponds to a slot or an available slot.
15 . The apparatus of claim 14 , wherein a slot is an available slot if it is a downlink slot.
16 . The apparatus of claim 14 , wherein a slot is an available slot if it is a downlink slot or a flexible slot and symbol positions configured for the CSI-RS are downlink symbols or flexible symbols.